Crane arrangement for wrecking trucks



Feb. 14, 1950 E. c. VANDERGRIFT, sR.. Erm. 2,497,379

CRANE RRNGEMENT FOR WRECKING TRUCKS Filed Aug. 30, 1946 5 Shets-Sheet l BY /2/ e w f E E WMM Feb. 14, d 1950 Filed Aug. 30 1946 llac.; VANDERGRIFT, sn., ET AL 2,497,379

CRANE ARRANGEMENT FOR WRECKING TRUCKS 5 Sheets-Sheet 2 A TTOE/VEY eb., 14, 1950 E. c. VANDERGREFT, SR., ETAL 2;@#97379 CRANE RRANGEMENT FORWRECKING TRUCKS Filed Aug. 50, 1946 5 Sheets-Sheet 3 l N V EN TOR Y [M626 )6de/@WMM Feb. M, 1950 E.- c. VANDERGRIFT, sa., ET AL 2,497,379

CRANE ARRNGEMENT FOR WRECKING TRUCKS Filed Aug. 30, 1946 5 Sheets-Sheet 4 By lei Feb., M9 E95@ E. C. VANERGREFT, SR., ET AL,

CRANE ARRANGEMENT FOR WRECKING TRUCKS Filed Aug. 30, 1946 5 Shee'is-Sheet 5 Patented Feb. 14, 1950 UNITED l' STATE-s PATENT' A'-orrlcr.

`CRANE ARRANGEMENT Foa wmscxmc rRUcxs Ercel C. Vandergrift, Sr., and Alfred Nafiin,

Detroit, Mich.

Application August 30, 1946, Serial No. 693,942

11 Claims.

This invention relates to improvements in a cranevarrangement for a wrecking truck. It is an object of the invention to provide a crane arrangement upon a vehicle wherein the crane is so arranged that it may be safely employed for lifting heavy weights such as the front or rear end of a disabled car, and wherein the vehicle may be safely set in'motion when the crane is under load.

Another object of the invention is to provide such a crane arrangement for a wrecking truck including a two-piece boom the outer or rear portion of which'may be folded to rest upon the inner or forward portion when not in use; wherein supporting means are provided to which the front boom portion is pivoted and said means includes a s l member in which both boom portions may rest when not in use; and wherein a brace is pivoted on the supporting means for holding the boom in its raised, operative position.

A further object of the invention is to provide such a crane arrangement for a wrecking truck wherein the front boom portion,` when in operative position, and the axis of the brace are so located relative to the rear axle ofthe vehicle that an imaginary line extending at right angles from the said front boom portion substantially centrally of its length passes both through the pivot axis of the brace and through the axis of the said rear axle, thereby eliminating any tendency for the vehicle to tip when a heavy load g.. is being raised by the crane, and insuring that no tipping tendency develops when the vehicle is in motion and the load, such as the front end of a disabled car, is supported by the crane.

Another object of the invention is to provide a crane arrangement for a wrecking truck including a lift plate adapted to be raised or lowered by the crane behind the vehicle, wherein the lift plate is mounted for movement about two axes disposed at right angles to one another and is maintained a predetermined distance from the rear of the vehicle by a spacer bar to insure proper spacing between the vehicle and a disabled car, or other heavy weight, raised by the crane for towing.

Another object of the invention is to provide such a crane arrangement for a wrecking truck wherein the `boom is arranged to fold upon itself and when folded to assume 'a horizontal position contiguous to the main carrier, and hinged ooring portions are provided to extend across the bodyinterior over the folded boom to form a flat bottom for carrying necessary equipment, tools and the like. i

Having thus broadly stated some of the objects and advantages of the invention we will now proceed to describe it in detail with the aid of the accompanying drawings, in which:

Figure 1 is a side elevation of a vehicle equipped with the invention.

Figure 2 is an enlarged plan viewA showing the rear portion of the vehicle.

Figures 3, 4, 5, 6 and '7 are sections on the lines 3 3, 4-4, 5--5, 6-6 and 'I-'I respectively of Figure l.

Figure 8 is a perspective view showing the supporting frame for the boom onwhich the brace for the latter is also pivoted.

Figure 9 is a side view, partly in section, showing the rear of the vehicle.

Figure 10 is a view of the rear axle taken on the line I U-ID of Figure 1 and enlarged, showing auxiliary springs and Ibearing plates projecting from the longitudinal carrier members resting thereon.

Figures 11 and 12 are views on the lines II-II and I2-I2 respectively ofeFigure 10, and

Figure 13 is a view on the line I3-I3 of Figure Figure 14 is a side view showing a modicatio of the spacer bar arrangement.

Figure 15, is a section on the line I 5-I5 of Figure 14, and v Y Figure 16 is an enlarged section on the line IG-I 6 of Figure 15.

Figure 1'7 is an enlarged detail showing the plate inserted between the frame and one supplemental spring,

Figure 18 is a side view, and

Figure 19 is a plan view thereof. I

Referring to the drawings, 1 designates a con'- ventional vehicle carrier or frame, 2 and 3 are ordinary front Vand rear springs secured both to the carrier I and to front and rear axles 4 and 5 having front and rear wheels 6 and 1 respectively thereon. Intermeriately of its length the longitudinal members 8 of the carrier, which in the present instance are of channel section, are spaced by `av reinforcing member 9 of box section the opposite sides of which are downwardly and outwardly inclined intermediately of their width so thatthel centralportion of the reinforcing member is higher. Spacedabove the member 9 is a plate I0 of such widthv that it extends out.- wardly of both the longitudinal carrier members 8. Mounted between the underside of the plate I0 centrally of its width and the reinforcing'member 9 is a shallow bolster Il, and extending between the sides of thel plate I0 and the top of the longitudinal members 8 are thicker bolsters Ila.

Mounted on the plate I0 is a supporting frame I2 (Figure 8) including a channel member I3 which extends centrally and longitudinally along the said plate, aligned cross members I4' extending laterally from opposite sides of the channel member I3 intermediately of the length of the latter and welded or otherwise suitably secured thereto, and angle members I5 parallel with and spaced from' opposite sides of the channel member I3 which extend rearwardly from and are suitably secured to the cross members I;4.,. Pivotally supported on a pin I6 extending through opposed openings I'I, formed through'opposite sides of the channel member I3 is thetfront extremity of a front boom portion I8 which is also ably of channel section and is adapted to lie Within the channel member I3. Pivoted5on'-a'pin' il!! extending through aligned openings formed through the front boom portion adjacent its rea-r extremity is a rear boom portion 20 which iis adapted either to project rearwardly from and in alignment with the frontbcnem4 portion Hit-as shown in Figures 1 and 2 or to be forwardly turned about the pin I9 to lie within the front boomV portion as shown in Figure 9. When outwardly exitended' thel'rearlboom; portieri:` 2 0; is held in alignment with the front .portionfl'f by the rear extremity Ioitheffl atter uponswhichf the adjacent end -of 'thea-rear portioniillfrests. vA substantiallyvshaped brace 2| has its extremities pivotally i- -mountedon horizontally-:aligned pins 22.1.vhich pass throughopeningsfformed"through the vertical sides of the angle vmembers I5. l'Arranged transversely.. on the v:undersideI` ofVV the' front' boom portion I8 adjacent itsrrear-extremity is a stop against` the Vfrontv fare4 ofswhich the' braceZ i be when the'boom\is.in its Inperative position. that is iwheni it fis upwardly.and-rearwardlyinclined. :Itwill be noted' 'that'.when: the boom'is not in use the front portion I8 lies in the channelmember I 3--an`dthe rearfportionv 20 y'lies ini the said 'front portion.` I8. l Moreover-*at* that: time the brace 2 I 'rests' uponE the plate 1 I 0 ina vsubstantially horizontal position. While the brace may be of any 'preferred-"construction iteconsists' in the present instance of two `VAdownwardly 'projecting angle Amembers 2 Ial connected atftheir outer extremities by a plate 2lb. It will thus be noted'that an imfaginary line KA passing at vright Vangles fthereto through the front boom portion flfandsubstan- 'tiallybisecting 'the lattery also passes through the 'axes rboth of the vpivots`22 -and'of'therear axel 5. Consequently the load supported bythe boom is transmitted to and" through therear axle without fear of causingthefveh-icle totipL when the latter iseitherstationary orlzinmotion.

Mountedalsoon the pin'f'l forpivotal move- 'ment withf'thef front boom portion I 8- are spaced 2arms 25'depending"from'thel-base26 of a winch. `Thelength of the armsissuch` that 'the front of the base is spacedabovethe" topof the'front 'boom portion I8wh`ile` its 'rear extremity Yrests Aupon the saidiront'boom portion. Mounted transversely of4e the winch-basev in'suitablebearings 2l and 28 lare shafts'ZS and' 30 respectively; and 54 I 'denotes 1ay removable crank' onone` extremity ci. the shaft 30"for' turningthe' latter, Mounted onfthe' shaft '29 isadrum'3I"having1a11gearf32secured to one side thereof, andfiixedonthef'sha-ft 3!) is` a pinion I33 coacting with the "gear 32. 34 indicates a 'ratehetto engage the teeth of the gear and hold the latter againstmrota'tion v however other' gearing arrangements may obviously be employed for "turning the drum 3 I. "fRotatably-supported on the Youterextremityfiz 'the 'rear boom-portion 2i! is a fsheave'3 5; and Lforwardly ofthe latter a down- Iwardly extending eye'36 ismounted upon the said portionZIL -Wound around the"drum"3 I is' a cable -3'I one `extremity of fwhich -fexten'ds vover fthe vsheave 35,aroundf-the uriderside'ofy apulley 38 rotatably:supportedion `I:axlalockl and terminates `in a hooklllly'vhilcl'r'is normallyfin kengagement with'the eye'36vso'thateas the cable' is-wound onto 'the'dr-umf 3 I byrrotaticn-di thecrankd I A`thebloelr '391 and a hook 421'deperfdingltherefromv areraised.

1=Rferring now-to Cthe4 carrier pla-te l:mounting shown in Figures 1 and 7. Supported both by the iback 45 oithe vehicle-:body: andcbyaltransverse carriermember 8a extending between 'the rear extremities of the longitudinal carrier members 8 -is a vertical plate 46. Projecting rearwardly from rthelatter 'are'spaced lugs 4`I having a pin i8 ex- "tending horizontally through them and also through a rearwardly projecting spacer bar 49 '#whichis thusy mounted for vertical movement, In order to insure that the bar 49 be held at right .tanglestothebackof the body at all times hooks 5I! are mounted on opposite sides of the said back ull5-eachto engage one.end of a chain 5I the opposite extremity of which is secured to the adljacent'sicleofthe barldtoward its rear extrem-ity. 4Ex-tending vertically-through? thef rear extremity cf'the spacerbar 4'9 isfarpin'f52` which also engages "vertically 'spaced' lugs 53 projecting forwardly fromsa carrierfplater-Sd. .'Centrally 'of' its width and above`the`ilugs153 .the-:plate isapertured to 'receive the hook^ll2. Suitably secured to each side 'of'the 'carrier platedis `az chain 55 '.forzattachment in any preferred manner to the article'to be liftedzand towed;suchzasthefront end of .a dis- :abled car'56.

'.In'the modicationishown in Figures 14' and 16 inclusive, a'bracket li'B is mountedzupon the back 'd'5 of" the` vehiclefbody, andi'formed' `integral with :.the'bra'cketiarehorizontally :opposed lugs 'dla `.spaced to receivea* spacerf'rbar "4'9a,:pre'ferably of reatangular v'sect-ion, .z between' them. This bar f is pivotally mounted ionia horizontal-pin 48a which falso extendsthrouglr the 4lugs'4'lza. `.'I'elescopically mounted in the barrazwhich'isftubular-'from its irear"'extrernitygiszan inner bar "491). "Formed :through the 'barfll Baare'opposed openings for "the `passage of^aibo1tc58;'andiformedthrough the inner'barlllbare-,a plurality f spacedY holesfor'the :passagefeoi the bolt, so`that'thetotal'flength ofthe f'spacer bar 'may be'fvarie'd tol snit different condi- -tions. `Integralwith Aand projecting rrearwardly from the rearrextremityof vthev inner spacer bar is .a link'59fto engagera hoeki'll extending'forwardly -and upwardlyfromthe'carrier plate '5411, and' pro- .fvidedfthrough the latter is Lan aperture i6 I: partway Sinto which the'link'g'mayextend. However'the rrearrportion-of'the sidesof thef1ink`59 are of for- Wardly-increasingfspacing` so thatvthe link can only enter a-shortdistancej into the-aperture' be- :fore itsr sidescontact the sides 'of the latter. Thus during "decelerationy of the vehicle a rearward :pressure is'exerte'dy againstV the carrier plate 54a .by the link f59. Secured as'by.f a'link62'which 'passesthrough an opening formed throughthe 'carrier'p'latef'onfeach sidelthereofiis a chain 63. Thesechains are-` employed for engagement in'any 'conventional `manner with .oneendoffra car to:be 'lifted-vand-subsequently towedfby thevehicle. 'In the arrang'ement'just described it willbe noted that accidental detachment of the'spacer'bar'llea 'fromthe carrier I plate 54a isl practicallygimpos- :sible becausewheni underixtension the"bartends .tofremain horizontal, and; moreovenxas z will be fseen VAfrom Figure14, 4*the "hook: 60 upwardly somewhat inclined. towardzthefcarrer-plate pand :when'the ,bar isunder icompressiontthe link 59 enters `:the :plate vi aperture 161 A`-whereby #upward movement' ofi the-'rear'.end'of the; .har .is rendered impossible.

IOpposed bearing'plates (Figures 17, .i8 and i9) are secured'to the .outerfaces'of the longitudinal .carrier memberslifforwardlynof' the rear axle 5 and immediately:beneath-the `pivot-mountings 'ofthe I V-shaped..brace2`|. 'Forme'd integral with the bearing plates 65 arexinwardfprojections 'I0 which bear against the undersides of the said members 8, and since the latter are rearwardly and upwardly inclined where they are contacted by the said projections the latter are similarly inclined to rest against the members throughout their length. The projections are also made wider than the members 8 to extend inwardly beyond the latter and receive bolts 1I which pass downwardly through openings 12 formed through the angle members I5 and have nuts thereon tightened against the undersides of the projections 10. Also formed integral with the' plates 65 are horizontal outwardly disposed flanges 66 braced at 66a which extend rearwardly over the rear axle 5. These flanges are widely -spaced from one another so that each one is close to one of the rear wheels of the vehicle. Secured to the rear axle 5 and projecting vertically upward therefrom are annular supports 61 which are radially serrated on their upper faces. Pads 68 similarly radially serrated on their undersides are mounted on the supports 61 and carry auxiliary coil springs 69 of upwardly decreasing diameter. The upper extremities of these springs bear against the undersides of the flanges 65. When the crane is in use the weight of the car or other article lifted is transmitted very largely onto the rear axle 5, and the auxiliary springs 69 transmit this extra load and prevent over-loading of the springs 1 normally provided upon the vehicle. It will be noted that the auxiliary spring arrangement is such that there is no tendency for the vehicle to tip: Firstly because the portions of the plates 66 contacted by the springs 69 are materially rearward of the points of attachment of the bearing plates 65 to the members 8 and angle members I5 so that any pressure exerted by the springs 69 upon the frame is in a longitudinal direction; and secondly, because the flanges 66 and the springs 69 are so widely spaced and are located adjacent the rear wheels of the vehicle. It will also be notedthat a reinforcing bar 14 is secured at opposite extremities to the inner faces of the plates 65 and extends transversely between them, and the upper side of the bar rests against the underside of the plate I0. Consequently dis-tortion of the said longitudinal members by pressure exerted upon the bearing plates 65 which are in transverse alignment with the said reinforcing bars 14 is prevented.

Extending vertically upon opposite sides of the plate I0 are inner body sides 15 and resting against the inner faces of the latter and upon the said plate are outer supports 16. 11 denotes inner supports of the same height as the supports 16, these supports 11 are secured against the outer faces of the channel member I3 intermediately of the length of the latter and are higher than the said member. Front flooring sections 19 resting on the outer supports 16 extendy inwardly from each body side partway over the adjacent inner support 11. Hinged along the inner longitudinal margin of one of the flooring sections 19 is a central ooring strip 80 which extends, when downturned, over the channel member I3 and partway over both of the inner supports 11 on which it is adapted to rest. The rear portion of the body interior, when the boom is lowered, is covered by rear flooring sections 8I each hinged on one of the body sides 15. Each section 8l is adapted to extend to the longitudinal center line of the vehicle. These rear flooring sections 8I are adapted to be supported by the outer supports 16, a transverse support 82 secured against the inner face of the back 45 of the body, by diagonal supports 83 mounted on the plate I0, and by the upper margins of the rear boom portion 20 when the latter is forwardly folded over the front boom portion I8. These ooring sections 19 and 8l and the central flooring strip 8U together form a continuous floor within the body of the vehicle so that any desired material may be easily loaded and trans'- ported thereon when the boom is lowered.

From the foregoing it will be clearly seen that we have devised a simple and compact crane arrangement upon a vehicle so that loads materially heavier than the vehicle and the crane thereon may be quickly and easily lifted and towed by the said vehicle; wherein the rear boom portion 20 is adapted to be turned forwardly onto the front boom portion I8 when not in use so that the entire boom rests upon the main carrier in a substantially horizontal position and does not project rearwardly of the vehicle body; wherein the boom and its supporting means when raised are so pos-itioned that the vehicle will not tip when a heavy load is supported thereby and the vehicle is in motion; wherein the hook 42 which supports the carrier plate 54, or 54a, in all adjusted positions of the spacer bar 49, or 45a, is maintained rearward- 1y of the sheave 35 so that the cable 31 tends to pull the carrier plate forward and retain the link 59 in engagement with the plate aperture 6I; and wherein the auxiliary springs 69 and the bearing plates 65 are so arranged that a force is exerted longitudinally of the carrier members 8 when the crane is under load.

While in the specification the preferred forms of construction have been described and shown it is understood that alterations and modifications may be made thereto provided they fall within the scope of the appended claims.

What we claim is:

1. A crane arrangement of the character described comprising a vehicle having a supporting frame thereon, a front boom portion pivoted thereon and adapted to extend upwardly and rearwardly from its pivot mounting, a rear boom portion pivoted on the front boom portion to extend rearwardly in alignment with the latter, said rear boom portion being also adapted to be turned forwardly about its axis to rest upon the front boom portion, a brace pivoted on the vehicle in front of the rear axle thereof adapted to support the boom portions in their upward and rearward positions, and hoisting means depending from the rear boom portion.

2. A crane arrangement of the character described comprising a` vehicle having a supporting frame thereon, a front boom portion pivoted thereon adapted to extend upwardly and rearwardly from its pivot mounting, a rear boom portion pivoted on the front boom portion to extend rearwardly in alignment with the latter, said rear boom portion being also adapted to be turned forward about its axis to rest on the front boom portion, a brace pivoted on the supporting frame in front of the rear axle, means on the front boom portion for engaging `the brace whereby said boom portion is held in its inclined position, a winch including a. rotary drum mounted on the vehicle, a sheave rotatable on the rear boom portion, a cable wound around the drum and passing over the sheave and means on the cable for engaging an article to be lifted.

3. A crane arrangement of the character described comprising a vehicle, a supporting frame thereon including a longitudinal channel member, a front boom portion pivoted on the latter adapted either to lie therein or to project upward- 'lyfand' rearwardly' from its pivot mounting; agrear lboom portion pivoted; on the front boom portion adjacent ltsr rearextremity, Vsaid rear boom :portion beingadapted eithertoproject from and in alignment witnthe front boomportion 0jto be 7folded forward to rest thereon, a brace pivoted on .thesupportingl frame, means on they front -boom portion adapted yto'be engaged Vby said: brace to retain said =portiongin its upwardly inclined position.said f-ront-iboom portion being shorter than thef; lengthaof they vehicleV and terminating'forwardly. of the rear extremity of the latter, said vrearfboom-portionwhen in alignment with'the front-boom portionprojecting-rearwardly beyond the vvehiclaa winchfhaving a rotary drum thereon pivoted on thel mounting for the front boom portion, asheave rotatableY on 'the rear boom portioma cable wound aroundthe drum and passing over-the sheave, and means on the cable for engaging an article toibe lifted.

A crane arrangement ofthe Icharacter described comp-rising avehicle including a main carrierhaving a longitudinal carrier member extendingl along each side, a` front and a. rear axle, springssupporting the main carrier on the front ,andY rear: axles, :a boom supported on the main carrierzand extending rearwardly thereof, hoisting means depending from the boom, bearing 'platesaon' `themaincarrier having anges projecting frearwardly therefrom, and auxiliary :springs mounted on the rear axle for exerting upward pressure on the flanges.

5.; :Inra: cranearrangement of the` character' described, .the combination of a vehicle including a :maimcarrier having a carriermember extending along each side; a front and a rear axle, springs supporting the main carrier on the front and rear axles, a supporting frame onthe'main carrier, a -boompivoted on the supporting frame forwardly of 'the'rear axle, a brace pivoted on the supporting #frame forwardly of the rear axle and rearwardly `of the pivot mounting of the boom', bearing plates on'the carrier members immediately beneath the -pivot'mountings of the brace, flanges projecting rearwardly from the bearing plates, and auxiliary springs mounted on the rear axle for exerting upward pressure on theanges.

/6.In a crane arrangement upon a vehicle, a boom extending upwardly and rearwardly from the vehicle, a spacer bar pivoted abouta horizontal-axis on the vehicle and projecting rearwardly thereof, a carrier plate connected to the -rearextremity of thel spacer bar"v for movement about a Vertical axis,.and hoisting* means carried fbythe boom= and connected to the carrier plate forV raising andlowering the'latter and means on said y.plate adapted to be engaged by saidspacer -bar fupon'deceleration of the vehicle to prevent" detachmentl of the-plate from the bar.

Ai7. Inf a crane arrangement uponla vehicle, av

"therein" for engagement by the rear extremityof lthe spacer bar upon deceleration of the vehicle to prevent detachment of vthe hook from spacer bar.

w8. In;- agcra'ne: arrangement upon a: vehiclaaa boom extending upwardly and-rearwardly of the vehicle andmounted thereon, a spacer-bar pivoted'on the rear of; the vehicle for movement about 4a transverse axis and projecting rearwardly from said vehicle, a carrier plate having means thereon for attachment to acar to be towed, a winch on Ythe Vehicle having a rotary drum thereon, a sheave; on the rear of the boom, a cable wound around the ydrum and extending over the sheave, .means onthe cable supporting the carrier plate, an upwardly projecting hook on the carrier plate engaging a vertical opening through the spacer bar, and said plate `having an aperture therein for Yengagement by the rear `extremity of the bar upondeceleration of the vehicle to prevent detachment of the hook.

. 9. The combination in `claim 8 wherein the' spacer baris telescopic, and the sheave is located vforwardly of the vertical opening through the spacer bar in all telescopic positions of the latter.

10. In al crane arrangement of the character described, the combination of a vehicle including a main carrier having a carrier member extending along each side, aV front and a rear axle, springs supporting the main carrier on the front and rearaxles, a supporting frame on the main carrier, a boom pivoted on the supporting frame forwardly of the rear axle, a brace pivoted on the supporting frame forwardly of the rear axle and rearwardly of the pivot mounting of theboom, the vpivot mountingsof the boom and brace being so Apositioned relative to the rear axle whereby the load supported by the boom will be transmitted to the vehicle at a point spaced from and for-- wardly of the rear axle to prevent upending of the vehicle.

r11. InV a crane arrangement of the character described, the combination of a vehicle including a main carrier havinga carrier member extending along `each side, afront'and a rear axle, springs supporting the main carrier on the iront and'rear axles, a supporting frame on the main carrier,a boom pivoted on the supporting frame forwardly of the rear axle, a brace pivoted on the supporting rframe forwardly of the rear axle and rearwardly of the pivot mounting of theV boom, bearing plates mounted on the main carrier forwardly vof the-rear axle, anges extending rearwardly from the bearing plates over the rear axle, and auxiliary springs mounted lon the rear axle forexerting upward pressure upon the flanges vwhereby when fthe auxiliary springs are under loadv force is exertedlongitudinally of the main carrier through the flanges andbearing plates. ERCEL C. VANDERGRIFT, SR. ALFRED NAFFIN.

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UNITED STATES PATENTS Number Name Date 1,461,894 Deucher July 17, 1923 1,551,132 Butler Aug. v25, 1925 1,725,952 Beebe Aug. 27, 1929 1,767,470 Mitchell June 24, 1930 1,794,148 Collins Feb. 24, 1931 "2,045,793 Pearson et al June 30, 1936 2,111,341 Tetrault Mar. l5, 1938 2,145,378 Trippensee Jan` 3l, 1939 2,197,406 Fleming et al Apr. 16, 1940 '2,283,443 'Klein May 19, 1942 

